Checked with Adobe customer service and I still have authorization available.
So I don't know what to do. I can't connect to my ebook reader library (Bookeen Cybook Muse on the onboard library). The connection is ok, but i get the error E_ACT_TOO_MANY_ACTIVATIONS. So the Adobe DRM protected book aren't readable on the ebook reader. Bookeen support said that I have reached the maximum number of activation and that I have to contact Adobe customer service for a reinitialisation. And now Adobe tellsme that the number of activation is ok, but it still not working.